Fix WebRTC API framework build.

webrtc/build/ios/build_ios_libs.sh

Index: webrtc/build/ios/build_ios_libs.sh
diff --git a/webrtc/build/ios/build_ios_libs.sh b/webrtc/build/ios/build_ios_libs.sh
index 5d6157aab2f5e21e0de5bbfd794326876174a2a7..a01d128373eb216f499d0a800700e26b690b8b61 100755
--- a/webrtc/build/ios/build_ios_libs.sh
+++ b/webrtc/build/ios/build_ios_libs.sh
@@ -10,77 +10,138 @@
 
 # Generates static FAT libraries for ios in out_ios_libs.
 
-# Flag to build the new or legacy version of the API.
-USE_LEGACY_API=0
+# Exit on errors.
+set -e
 
-# Check for Darwin.
-if [[ ! $(uname) = "Darwin" ]]; then
-  echo "OS/X required." >&2
-fi
-
-# Check for libtool.
-if [[ -z $(which libtool) ]]; then
-  echo "Missing libtool binary." >&2
-fi
-
-# Check for GYP generator.
-SCRIPT_DIR=$(dirname $0)
+# Globals.
+SCRIPT_DIR=$(cd $(dirname $0) && pwd)
 WEBRTC_BASE_DIR=${SCRIPT_DIR}/../../..
 GYP_WEBRTC_SCRIPT=${WEBRTC_BASE_DIR}/webrtc/build/gyp_webrtc
-if [[ ! -x ${GYP_WEBRTC_SCRIPT} ]]; then
-  echo "Failed to find gyp generator." >&2
-  exit 1
-fi
-# Check for export headers script.
-EXPORT_HEADERS_SCRIPT=${SCRIPT_DIR}/export_headers
-if [[ ! -x ${EXPORT_HEADERS_SCRIPT} ]]; then
-  echo "Failed to find export headers script." >&2
-  exit 1
-fi
-# Check for merge script.
-MERGE_SCRIPT=${SCRIPT_DIR}/merge_ios_libs
-if [[ ! -x ${MERGE_SCRIPT} ]]; then
-  echo "Failed to find library merging script." >&2
-  exit 1
-fi
+EXPORT_HEADERS_SCRIPT=${SCRIPT_DIR}/export_headers.py
+MERGE_SCRIPT=${SCRIPT_DIR}/merge_ios_libs.py
+
+function check_preconditions {
+  # Check for Darwin.
+  if [[ ! $(uname) = "Darwin" ]]; then
+    echo "OS/X required." >&2
+    exit 1
+  fi
+
+  # Check for libtool.
+  if [[ -z $(which libtool) ]]; then
+    echo "Missing libtool binary." >&2
+    exit 1
+  fi
+
+  # Check for GYP generator.
+  if [[ ! -x ${GYP_WEBRTC_SCRIPT} ]]; then
+    echo "Failed to find gyp generator." >&2
+    exit 1
+  fi
+
+  # Check for export headers script.
+  if [[ ! -x ${EXPORT_HEADERS_SCRIPT} ]]; then
+    echo "Failed to find export headers script." >&2
+    exit 1
+  fi
 
-pushd ${WEBRTC_BASE_DIR}
-LIBRARY_BASE_DIR="out_ios_libs"
+  # Check for merge script.
+  if [[ ! -x ${MERGE_SCRIPT} ]]; then
+    echo "Failed to find library merging script." >&2
+    exit 1
+  fi
+}
 
 function build_webrtc {
-  OUTPUT_DIR=$1
-  FLAVOR=$2
-  TARGET_ARCH=$3
-  if [[ ${TARGET_ARCH} = 'arm' || ${TARGET_ARCH} = 'arm64' ]]; then
-    FLAVOR="${FLAVOR}-iphoneos"
+  local base_output_dir=$1
+  local flavor=$2
+  local target_arch=$3
+  local ninja_output_dir=${base_output_dir}/${target_arch}_ninja
+  local library_output_dir=${base_output_dir}/${target_arch}_libs
+  if [[ ${target_arch} = 'arm' || ${target_arch} = 'arm64' ]]; then
+    flavor="${flavor}-iphoneos"
   else
-    FLAVOR="${FLAVOR}-iphonesimulator"
+    flavor="${flavor}-iphonesimulator"
   fi
-  export GYP_DEFINES="OS=ios target_arch=${TARGET_ARCH} use_objc_h264=1 \
+  export GYP_DEFINES="OS=ios target_arch=${target_arch} use_objc_h264=1 \
 clang_xcode=1 ios_override_visibility=1"
   export GYP_GENERATORS="ninja"
-  export GYP_GENERATOR_FLAGS="output_dir=${OUTPUT_DIR}"
+  export GYP_GENERATOR_FLAGS="output_dir=${ninja_output_dir}"
+
+  # GYP generation requires relative path for some reason.
+  pushd ${WEBRTC_BASE_DIR}
   webrtc/build/gyp_webrtc webrtc/build/ios/merge_ios_libs.gyp
+  popd
   if [[ ${USE_LEGACY_API} -eq 1 ]]; then
-    ninja -C ${OUTPUT_DIR}/${FLAVOR} libjingle_peerconnection_objc_no_op
+    ninja -C ${ninja_output_dir}/${flavor} libjingle_peerconnection_objc_no_op
   else
-    ninja -C ${OUTPUT_DIR}/${FLAVOR} webrtc_api_objc_no_op
+    ninja -C ${ninja_output_dir}/${flavor} webrtc_api_objc_no_op
   fi
-  mkdir -p ${LIBRARY_BASE_DIR}/${TARGET_ARCH}
-  mv ${OUTPUT_DIR}/${FLAVOR}/*.a ${LIBRARY_BASE_DIR}/${TARGET_ARCH}
+  mkdir -p ${library_output_dir}
+
+  for f in ${ninja_output_dir}/${flavor}/*.a
+  do
+    ln -sf "${f}" "${library_output_dir}/$(basename ${f})"
+  done
 }
 
-# Build all the common architectures.
-build_webrtc "out_ios_arm" "Release" "arm"
-build_webrtc "out_ios_arm64" "Release" "arm64"
-build_webrtc "out_ios_ia32" "Release" "ia32"
-build_webrtc "out_ios_x86_64" "Release" "x64"
+function clean_artifacts {
+  local output_dir=$1
+  if [[ -d ${output_dir} ]]; then
+    rm -r ${output_dir}
+  fi
+}
+
+function usage {
+  echo "WebRTC iOS FAT libraries build script."
+  echo "Each architecture is compiled separately before being merged together."
+  echo "By default, the fat libraries will be created in out_ios_libs/fat_libs."
+  echo "The headers will be copied to out_ios_libs/include."
+  echo "Usage: $0 [-h] [-c] [-o]"
+  echo "  -h Print this help."
+  echo "  -c Removes generated build output."
+  echo "  -o Specifies a directory to output build artifacts to."
+  echo "     If specified together with -c, deletes the dir."
+  exit 0
+}
 
-popd
+check_preconditions
+
+# Set default arguments.
+# Output directory for build artifacts.
+OUTPUT_DIR=${WEBRTC_BASE_DIR}/out_ios_libs
+# Flag to build the new or legacy version of the API.
+USE_LEGACY_API=0
+PERFORM_CLEAN=0
+
+# Parse arguments.
+while getopts "hco:" opt; do
+  case "${opt}" in
+    h) usage;;
+    c) PERFORM_CLEAN=1;;
+    o) OUTPUT_DIR="${OPTARG}";;
+    *)
+      usage
+      exit 1
+      ;;
+  esac
+done
+
+if [[ ${PERFORM_CLEAN} -ne 0 ]]; then
+  clean_artifacts ${OUTPUT_DIR}
+  exit 0
+fi
+
+# Build all the common architectures.
+archs=( "arm" "arm64" "ia32" "x64" )
+for arch in "${archs[@]}"
+do
+  echo "Building WebRTC arch: ${arch}"
+  build_webrtc ${OUTPUT_DIR} "Profile" $arch
+done
 
 # Export header files.
-${EXPORT_HEADERS_SCRIPT} ${WEBRTC_BASE_DIR}/${LIBRARY_BASE_DIR} \
-    ${USE_LEGACY_API}
+${EXPORT_HEADERS_SCRIPT} ${OUTPUT_DIR} ${USE_LEGACY_API}
 
 # Merge the libraries together.
-${MERGE_SCRIPT} ${WEBRTC_BASE_DIR}/${LIBRARY_BASE_DIR}
+${MERGE_SCRIPT} ${OUTPUT_DIR}